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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h91746.exe  halfmoon.exe halsv.exe  harmonyClient.exe Hbinst.exe
hbsrv.exe  hbtoeaddon.exe hc.exe  hcenter.exe  hcm.exe 
hcontrol.exe hcwP1Utl.exe  hcwprn.exe  hdashcut.exe hdtune.exe 
helper.exe helpinst.exe  hffsrv.exe hgcctl95.exe  hgqhp.exe
hideippla.exe HidFind.exe hijackthis.exe hijackthis_v2.exe hkcmd.exe
hkserv.exe hkss.exe HKWnd.exe hl.exe hlp16.exe
hndlrsvc.exe hnm_svc.exe homerunner.exe hookdump.exe hookdump.exe
hot_canada.exe hotkeyapp.exe hotsync.exe hottray.exe hpadvisor.exe
hpbootop.exe HPBootOp.exe hpbpsttp.exe hpbpsttp.exe hpcmpmgr.exe
hpcmpmgr.exe  HPConfig.exe hpcron.exe hpdarc.exe hpdj.exe
hpfbkg02.exe Hpfbkg03.exe hpfsched.exe hpgs2wnd.exe hpgs2wnf.exe
hpgs2wnf.exe hphipm07.exe HPHipm09.exe hphipm11.exe hphmon03.exe
hphmon03.exe  hphmon04.exe hphmon05.exe hphmon05.exe hphmon06.exe
hphupd04.exe hphupd05.exe hphupd06.exe hphupd08.exe HPI_Monitor.exe
HPLamp.exe hplampc.exe hpmdlbia.exe Hpmdlbwa.exe HpmmKbd.exe
hpmsp2ia.exe HPMTBXWA.exe HPNRA.exe hpoavn07.exe hpobkgo1.exe
Hpobnz08.exe Hpobrt07.exe hpoddt01.exe  hpoevm06.exe hpoevm07.exe
hpoevm08.exe hpoevm09.exe hpohmr08.exe hpoipm07.exe HPOJStart.exe
Hpojvdix.exe hpomlch.exe hpoorn07.exe hposol08.exe hposts07.exe
hposts08.exe HPOtbxo1.exe hpotdd01.exe hppdirector.exe hpppt.exe
HPPrint.exe hppwrsav.exe hpqcmon.exe hpqcmon.exe hpqgalry.exe
hpqste08.exe hpqste08.exe hpqthb08.exe hpqtra08.exe HPQWMI.exe
hpqwmiex.exe hprblog.exe hprtry09.exe HPScanFix.exe hpsjbmgr.exe
hpsjvxd.exe hpsw.exe hpsysdrv.exe hptskmgr.exe hpw8tbx.exe
hpwamain.exe hpwirelessassistant.exe HPWirelessMgr.exe HPWNTBX.exe Hpwuschd.exe
hpwuschd2.exe  Hpzeng03.exe hpzipm12.exe Hpzsta9x.exe hpzstatx.exe
hpztsb01.exe hpztsb02.exe hpztsb03.exe hpztsb04.exe hpztsb05.exe
hpztsb06.exe hpztsb07.exe hpztsb08.exe hpztsb09.exe hpztsb10.exe
hpztsb11.exe hpztsb12.exe hson.exe HSTurbo.exe htpatch.exe 
hwapi.exe HWSetup.exe hxdef.exe hxdef.exe hxdl.exe
hxiul.exe