hi.. since a few days avast has been detecting ms update as virus, i have attached a screenshot so you guys can have a look. Kindly guide me as to how am i... in this thread in this sub-forum in the entire site. Advanced Search Cancel ... R2 CDPUserSvc_2b698;CDPUserSvc_2b698;C:\WINDOWS\System32\svchost.exe -k. The svchost.exe virus, in particular, falls under this umbrella of ambiguity — while the virus attached to this file is obviously bad, the svchost.exe by itself is really a core Windows file. Svchost.exe actually stands for "service host," and it is a file used by many Windows applications. Despite this, it often is mistaken as a virus.