If you feel your computer is acting strangly or you connection is slow just go to Start>Run>Type cmd>then type netstat -an and if you see a dangerous Ip according to the guide below then you computer is infected or being hacked.

Guide:
port 0 REx
port 1 (UDP) - Sockets des Troie
port 2 Death
port 5 yoyo
port 11 Skun
port 16 Skun
port 17 Skun
port 18 Skun
port 19 Skun
port 20 Amanda

port 21 ADM worm, Back Construction, Blade Runner, BlueFire, Bmail, Cattivik FTP Server, CC Invader, Dark FTP, Doly Trojan, FreddyK, Invisible FTP, KWM, MscanWorm, NerTe, NokNok, Pinochet, Ramen, Reverse Trojan, RTB 666, The Flu, WinCrash, Voyager Alpha Force

port 22 InCommand, Shaft, Skun
p
ort 23 ADM worm, Aphex's Remote Packet Sniffer , AutoSpY, ButtMan, Fire HacKer, My Very Own trojan, Pest, RTB 666, Tiny Telnet Server - TTS, Truva Atl

port 25 Antigen, Barok, BSE, Email Password Sender , Gip, Laocoon, Magic Horse, MBT , Moscow Email trojan, Nimda, Shtirlitz, Stukach, Tapiras, WinPC

port 27 Assasin
port 28 Amanda
port 30 Agent 40421
port 31 Agent 40421, Masters Paradise, Skun
port 37 ADM worm
port 39 SubSARI
port 41 Deep Throat , Foreplay
port 44 Arctic
port 51 f**k Lamers Backdoor
port 52 MuSka52, Skun
port 53 ADM worm, li0n, MscanWorm, MuSka52
port 54 MuSka52
port 66 AL-Bareki
port 69 BackGate Kit, Nimda, Pasana, Storm, Storm worm, Theef
port 69 (UDP) - Pasana
port 70 ADM worm
port 79 ADM worm, Firehotcker

port 80 711 trojan (Seven Eleven), AckCmd, BlueFire, Cafeini, Duddie, Executor, God Message, Intruzzo , Latinus, Lithium, MscanWorm, NerTe, Nimda, Noob, Optix Lite, Optix Pro , Power, Ramen, Remote Shell , Reverse WWW Tunnel Backdoor , RingZero, RTB 666, Scalper, Screen Cutter , Seeker, Slapper, Web Server CT , WebDownloader

port 80 (UDP) - Penrox
port 81 Asylum
port 101 Skun
port 102 Delf, Skun
port 103 Skun
port 105 NerTe
port 107 Skun
port 109 ADM worm
port 110 ADM worm
port 111 ADM worm, MscanWorm
port 113 ADM worm, Alicia, Cyn, DataSpy Network X, Dosh, Gibbon, Taskman
port 120 Skun
port 121 Attack Bot, God Message, JammerKillah
port 123 Net Controller
port 137 Chode, Nimda
port 137 (UDP) - Bugbear, Msinit, Opaserv, Qaz
port 138 Chode, Nimda
port 139 Chode, Fire HacKer, Msinit, Nimda, Opaserv, Qaz
port 143 ADM worm
port 146 Infector
port 146 (UDP) - Infector
port 166 NokNok
port 170 A-trojan
port 171 A-trojan
port 200 CyberSpy
port 201 One Windows Trojan
port 202 One Windows Trojan, Skun
port 211 One Windows Trojan
port 212 One Windows Trojan
port 221 Snape
port 222 NeuroticKat, Snape
port 230 Skun
port 231 Skun
port 232 Skun
port 285 Delf
port 299 One Windows Trojan
port 334 Backage
port 335 Nautical
port 370 NeuroticKat
port 400 Argentino
port 401 One Windows Trojan
port 402 One Windows Trojan
port 411 Backage
port 420 Breach
port 443 Slapper
port 445 Nimda
port 455 Fatal Connections
port 511 T0rn Rootkit
port 513 ADM worm
port 514 ADM worm
port 515 MscanWorm, Ramen
port 520 (UDP) - A UDP backdoor
port 555 711 trojan (Seven Eleven), Phase Zero, Phase-0
port 564 Oracle
port 589 Assasin
port 600 SweetHeart
port 623 RTB 666
port 635 ADM worm
port 650 Assasin
port 661 NokNok

port 666 Attack FTP, Back Construction, BLA trojan, NokNok, Reverse Trojan, Shadow Phyre, Unicorn, yoyo

port 667 NokNok, SniperNet
port 668 Unicorn
port 669 DP trojan , SniperNet
port 680 RTB 666
port 692 GayOL
port 700 REx
port 777 Undetected
port 798 Oracle
port 808 WinHole
port 831 NeuroticKat
port 901 Net-Devil, Pest
port 902 Net-Devil, Pest
port 903 Net-Devil
port 911 Dark Shadow, Dark Shadow
port 956 Crat Pro
port 991 Snape
port 992 Snape
port 999 Deep Throat , Foreplay
port 1000 Der Sp鋒er / Der Spaeher, Direct Connection, GOTHIC Intruder , Theef

port 1001 Der Sp鋒er / Der Spaeher, GOTHIC Intruder , Lula, One Windows Trojan, Theef

port 1005 Pest, Theef
port 1008 AutoSpY, li0n
port 1010 Doly Trojan
port 1011 Doly Trojan
port 1012 Doly Trojan
port 1015 Doly Trojan
port 1016 Doly Trojan
port 1020 Vampire

port 1024 Latinus, Lithium, NetSpy, Ptakks

port 1025 AcidkoR, BDDT, DataSpy Network X, Fraggle Rock , KiLo, MuSka52, NetSpy, Optix Pro , Paltalk, Ptakks, Real 2000, Remote Anything, Remote Explorer Y2K, Remote Storm, RemoteNC

port 1025 (UDP) - KiLo, Optix Pro , Ptakks, Real 2000, Remote Anything, Remote Explorer Y2K, Remote Storm, Yajing

port 1026 BDDT, Dark IRC, DataSpy Network X, Delta Remote Access , Dosh, Duddie, IRC Contact, Remote Explorer 2000, RUX The TIc.K

port 1026 (UDP) - Remote Explorer 2000
port 1027 Clandestine, DataSpy Network X, KiLo, UandMe
port 1028 DataSpy Network X, Dosh, Gibbon, KiLo, KWM, Litmus, Paltalk, SubSARI
port 1028 (UDP) - KiLo, SubSARI
port 1029 Clandestine, KWM, Litmus, SubSARI
port 1029 (UDP) - SubSARI
port 1030 Gibbon, KWM
port 1031 KWM, Little Witch, Xanadu, Xot
port 1031 (UDP) - Xot
port 1032 Akosch4, Dosh, KWM
port 1032 (UDP) - Akosch4
port 1033 Dosh, KWM, Little Witch, Net Advance
port 1034 KWM
port 1035 Dosh, KWM, RemoteNC, Truva Atl
port 1036 KWM
port 1037 Arctic , Dosh, KWM, MoSucker
port 1039 Dosh
port 1041 Dosh, RemoteNC
port 1042 BLA trojan
port 1042 (UDP) - BLA trojan
port 1043 Dosh
port 1044 Ptakks
port 1044 (UDP) - Ptakks
port 1047 RemoteNC
port 1049 Delf, The Hobbit Daemon
port 1052 Fire HacKer, Slapper, The Hobbit Daemon
port 1053 The Thief
port 1054 AckCmd, RemoteNC
port 1080 SubSeven 2.2, WinHole
port 1081 WinHole
port 1082 WinHole
port 1083 WinHole
port 1092 Hvl RAT
port 1095 Blood Fest Evolution, Hvl RAT, Remote Administration Tool - RAT
port 1097 Blood Fest Evolution, Hvl RAT, Remote Administration Tool - RAT
port 1098 Blood Fest Evolution, Hvl RAT, Remote Administration Tool - RAT
port 1099 Blood Fest Evolution, Hvl RAT, Remote Administration Tool - RAT
port 1104 (UDP) - RexxRave
port 1111 Daodan, Ultors Trojan
port 1111 (UDP) - Daodan
port 1115 Lurker, Protoss
port 1116 Lurker
port 1116 (UDP) - Lurker
port 1122 Last 2000, Singularity
port 1122 (UDP) - Last 2000, Singularity
port 1133 SweetHeart
port 1150 Orion
port 1151 Orion
port 1160 BlackRat
port 1166 CrazzyNet
port 1167 CrazzyNet
port 1170 Psyber Stream Server , Voice
port 1180 Unin68
port 1183 Cyn, SweetHeart
port 1183 (UDP) - Cyn, SweetHeart
port 1200 (UDP) - NoBackO
port 1201 (UDP) - NoBackO
port 1207 SoftWAR
port 1208 Infector
port 1212 Kaos
port 1215 Force
port 1218 Force
port 1219 Force
port 1221 f**k Lamers Backdoor
port 1222 f**k Lamers Backdoor
port 1234 KiLo, Ultors Trojan
port 1243 BackDoor-G, SubSeven , Tiles
port 1245 VooDoo Doll
port 1255 Scarab
port 1256 Project nEXT, RexxRave
port 1272 The Matrix
port 1313 NETrojan
port 1314 Daodan
port 1349 BO dll
port 1369 SubSeven 2.2
port 1386 Dagger
port 1415 Last 2000, Singularity
port 1433 Voyager Alpha Force
port 1441 Remote Storm
port 1492 FTP99CMP
port 1524 Trinoo
port 1560 Big Gluck, Duddie
port 1561 (UDP) - MuSka52
port 1600 Direct Connection
port 1601 Direct Connection
port 1602 Direct Connection
port 1703 Exploiter
port 1711 yoyo
port 1772 NetControle
port 1772 (UDP) - NetControle
port 1777 Scarab
port 1826 Glacier
port 1833 TCC
port 1834 TCC
port 1835 TCC
port 1836 TCC
port 1837 TCC
port 1905 Delta Remote Access
port 1911 Arctic
port 1966 Fake FTP
port 1967 For Your Eyes Only , WM FTP Server
port 1978 (UDP) - Slapper
port 1981 Bowl, Shockrave
port 1983 Q-taz
port 1984 Intruzzo , Q-taz
port 1985 Black Diver, Q-taz
port 1985 (UDP) - Black Diver
port 1986 Akosch4
port 1991 PitFall
port 1999 Back Door, SubSeven , TransScout

port 2000 A-trojan, Der Sp鋒er / Der Spaeher, Fear, Force, GOTHIC Intruder , Last 2000, Real 2000, Remote Explorer 2000, Remote Explorer Y2K, Senna Spy Trojan Generator, Singularity

port 2000 (UDP) - GOTHIC Intruder , Real 2000, Remote Explorer 2000, Remote Explorer Y2K

port 2001 Der Sp鋒er / Der Spaeher, Duddie, Glacier, Protoss, Senna Spy Trojan Generator, Singularity, Trojan Cow

port 2001 (UDP) - Scalper
port 2002 Duddie, Senna Spy Trojan Generator, Sensive
port 2002 (UDP) - Slapper
port 2004 Duddie
port 2005 Duddie
port 2023 Ripper Pro
port 2060 Protoss
port 2080 WinHole
port 2101 SweetHeart
port 2115 Bugs
port 2130 (UDP) - Mini BackLash
port 2140 The Invasor
port 2140 (UDP) - Deep Throat , Foreplay , The Invasor
port 2149 Deep Throat
port 2150 R0xr4t
port 2156 Oracle
port 2222 SweetHeart, Way
port 2222 (UDP) - SweetHeart, Way
port 2281 Nautical
port 2283 Hvl RAT
port 2300 Storm
port 2311 Studio 54
port 2330 IRC Contact
port 2331 IRC Contact
port 2332 IRC Contact, Silent Spy
port 2333 IRC Contact
port 2334 IRC Contact, Power
port 2335 IRC Contact
port 2336 IRC Contact
port 2337 IRC Contact, The Hobbit Daemon
port 2338 IRC Contact
port 2339 IRC Contact, Voice Spy
port 2339 (UDP) - Voice Spy
port 2343 Asylum
port 2345 Doly Trojan
port 2407 yoyo
port 2418 Intruzzo
port 2555 li0n, T0rn Rootkit
port 2565 Striker trojan
port 2583 WinCrash
port 2589 Dagger
port 2600 Digital RootBeer
port 2702 Black Diver
port 2702 (UDP) - Black Diver
port 2772 SubSeven
port 2773 SubSeven , SubSeven 2.1 Gold
port 2774 SubSeven , SubSeven 2.1 Gold
port 2800 Theef
port 2929 Konik
port 2983 Breach
port 2989 (UDP) - Remote Administration Tool - RAT
port 3000 InetSpy, Remote Shut, Theef
port 3006 Clandestine
port 3024 WinCrash
port 3031 MicroSpy
port 3119 Delta Remote Access
port 3128 Reverse WWW Tunnel Backdoor , RingZero
port 3129 Masters Paradise
port 3131 SubSARI
port 3150 Deep Throat , The Invasor, The Invasor
port 3150 (UDP) - Deep Throat , Foreplay , Mini BackLash
port 3215 XHX
port 3215 (UDP) - XHX
port 3292 Xposure
port 3295 Xposure
port 3333 Daodan
port 3333 (UDP) - Daodan
port 3410 Optix Pro
port 3417 Xposure
port 3418 Xposure
port 3456 Fear, Force, Terror trojan
port 3459 Eclipse 2000, Sanctuary
port 3505 AutoSpY
port 3700 Portal of Doom
port 3721 Whirlpool
port 3723 Mantis
port 3777 PsychWard
port 3791 Total Solar Eclypse
port 3800 Total Solar Eclypse
port 3801 Total Solar Eclypse
port 3945 Delta Remote Access
port 3996 Remote Anything
port 3996 (UDP) - Remote Anything
port 3997 Remote Anything
port 3999 Remote Anything
port 4000 Remote Anything, SkyDance
port 4092 WinCrash
port 4128 RedShad
port 4128 (UDP) - RedShad
port 4156 (UDP) - Slapper
port 4201 War trojan
port 4210 Netkey
port 4211 Netkey
port 4225 Silent Spy
port 4242 Virtual Hacking Machine - VHM
port 4315 Power
port 4321 BoBo
port 4414 AL-Bareki
port 4442 Oracle
port 4444 CrackDown, Oracle, Prosiak, Swift Remote
port 4445 Oracle
port 4447 Oracle
port 4449 Oracle
port 4451 Oracle
port 4488 Event Horizon
port 4567 File Nail
port 4653 Cero
port 4666 Mneah
port 4700 Theef
port 4836 Power
port 5000 Back Door Setup, Bubbel, Ra1d, Sockets des Troie
port 5001 Back Door Setup, Sockets des Troie
port 5002 Shaft
port 5005 Aladino
port 5011 Peanut Brittle
port 5025 WM Remote KeyLogger
port 5031 Net Metropolitan
port 5032 Net Metropolitan
port 5050 R0xr4t
port 5135 Bmail
port 5150 Pizza
port 5151 Optix Lite
port 5152 Laphex
port 5155 Oracle
port 5221 NOSecure
port 5250 Pizza
port 5321 Firehotcker
port 5333 Backage
port 5350 Pizza
port 5377 Iani
port 5400 Back Construction, Blade Runner, Digital Spy
port 5401 Back Construction, Blade Runner, Digital Spy , Mneah
port 5402 Back Construction, Blade Runner, Digital Spy , Mneah
port 5418 DarkSky
port 5419 DarkSky
port 5419 (UDP) - DarkSky
port 5430 Net Advance
port 5450 Pizza
port 5503 Remote Shell
port 5534 The Flu
port 5550 Pizza
port 5555 Daodan, NoXcape
port 5555 (UDP) - Daodan
port 5556 BO Facil
port 5557 BO Facil
port 5569 Robo-Hack
port 5650 Pizza
port 5669 SpArTa
port 5679 Nautical
port 5695 Assasin
port 5696 Assasin
port 5697 Assasin
port 5742 WinCrash
port 5802 Y3K RAT
port 5873 SubSeven 2.2
port 5880 Y3K RAT
port 5882 Y3K RAT
port 5882 (UDP) - Y3K RAT
port 5888 Y3K RAT
port 5888 (UDP) - Y3K RAT
port 5889 Y3K RAT
port 5933 NOSecure
port 6000 Aladino, NetBus , The Thing
port 6006 Bad Blood
port 6267 DarkSky
port 6400 The Thing
port 6521 Oracle
port 6526 Glacier
port 6556 AutoSpY
port 6661 Weia-Meia
port 6666 AL-Bareki, KiLo, SpArTa
port 6666 (UDP) - KiLo

port 6667 Acropolis, BlackRat, Dark FTP, Dark IRC, DataSpy Network X, Gunsan, InCommand, Kaitex, KiLo, Laocoon, Net-Devil, Reverse Trojan, ScheduleAgent, SlackBot, SubSeven , Subseven 2.1.4 DefCon 8, Trinity, Y3K RAT, yoyo

port 6667 (UDP) - KiLo
port 6669 Host Control, Vampire, Voyager Alpha Force
port 6670 BackWeb Server, Deep Throat , Foreplay , WinNuke eXtreame
port 6697 Force

port 6711 BackDoor-G, Duddie, KiLo, Little Witch, Netkey, Spadeace, SubSARI, SubSeven , SweetHeart, UandMe, Way, VP Killer

port 6712 Funny trojan, KiLo, Spadeace, SubSeven
port 6713 KiLo, SubSeven
port 6714 KiLo
port 6715 KiLo
port 6718 KiLo
port 6723 Mstream
port 6766 KiLo
port 6766 (UDP) - KiLo