Once every 6 months or so, I do get a virus.  I came across this one from Limewire. Symptoms:  regedit, cmd & task manager lost! "in use by another program" After using Ad-Aware and Microsoft Defender, my system was reported as clean; only clearing out some cookies. Several sites report the problem:  Cannot open task manager; task manager fails, regedit and cmd same issue. The virus takes hold of these application pointers, fortunately I use an application as a replacement for command prompt so I was able to source the issue. Resolution:   Two files need to renamed/deleted:     b.exe  (in Windows root folder) and svchost.exe  located in Startup.  The virus uses a trusted name (svchost.exe) but puts the file in the Startup folder. Background: I don't use any memory resident virus prevention software.  I rarely come across malware, however when looking for a software crack, questionable software, or the like.  In this case, I downloaded something from Limewire.  Many of...