Sluggish PCs are commonly caused programs running in the background, which in some cases are started automatically when Windows starts up.

Sometimes these programs are useful but quite often, however, are not needed, and some many cases may be disgusted as trojans, spywares, malwares and even viruses.

The pages below provide a guide on the usefulness these background tasks, Windows 98 / 2000 / XP / Vista / 7 services, and Windows Startups, and removal procedures when recommended.

Common Windows Processes: A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U - V - W - X - Y - Z

Common Windows Services: A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U - V - W - X - Y - Z

Common Third Party Processes: 0-A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U - V - W - X - Y - Z

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p2pnetworking.exe  padexe.exe passrv.exe pronomgr.exe ps2.exe
paytime.exe  pccguide.exe  Pcclean.exe pchbutton.exe pcmservice.exe
pcs.exe pcs_agnt.exe pcscm.exe  pcservice.exe pcsws.exe
pctfw.exe pctspk.exe pd6000sm.exe  pdesk.exe  pdservice.exe 
pdvddxsrv.exe pdvdserv.exe picasamediadetector.exe pifsvc.exe  pinger.exe
plaxohelper.exe  pmsngr.exe  pmsnrr.exe pnagent(2).exe pnagent.exe
pnkbstra.exe pnkbstrb.exe  pokapoka63.exe popuper.exe portaol.exe 
powerreg-scheduler(2).exe powerreg-scheduler.exe pptd40nt.exe pqv2isvc.exe prdtect.exe 
preinstt.exe  preload.exe printray.exe promon.exe  psdrvcheck.exe