I am Makarand P from the Dell Social Media team.
To effectively remove virus and repair the computer after the virus cleanup, it would suggest you to use freewares like malware bytes and super anti spyware. To repair the computer you could first use a freeware like ccleaner and repair registry errors. After which run a SFC scan(System file checker) which repairs any files found corrupt. If the need be, it would ask you to insert the operating system cd. Please do so. Use a antivirus on the computer like AVG 2012 or Mcafee scan plus. It's a freeware and is available on www.download.com. The other software mentioned can be downloaded from the same website.
To run the SFC, click start, type cmd in the search box or the run box(windows 7 and vista in the first case and windows XP for the latter). Right click and select run as administrator. Type sfc /scannow and it should start verifying the operating system for any faults or corruption.
Kindly revert for further clarifications.
Thanks and regards,
Dell Social Media Responder.