Adware:Adware (or spyware) is a small program that is designed to show advertisements (in various form and degrees of intrusiveness) on your computer. It often reports personal information back to its owners. As a result your sense of privacy can be violated.
OnSrvr is an adware process that runs at startup. File OnSrvr.exe is related to different worms and other malware.
Technical details (How to remove OnSrvr(pop up))
processes files: OnSrvr.exe
registry entries: DeletethevalueOnSrvr Browsetothekey:HKEY_CURRENT_USERSOFTWAREMicrosoftWindowsCurrentVersionRun Delete the value OnSrvr Browse to the key: HKEY_CURRENT_USER SOFTWAREMicrosoftWindows CurrentVersionRun