what is drive F: ? is it a flash drive?
unless you are a 64bit system then you should be at sp3 if you do not know what you have, go to start, right click on my computer, on the general tab if you do not see 64bit under system then you have a 32bit and should be on sp3 download from link below and then go to Microsoft updates and there will be a slew of updates to install.
do a high priority scan, install all, then do a custom scan and install any rootkit updates listed under optional.
reboot as needed.
Courtesy of Tricky 300
Before you install SP3 read this article…
http://support.microsoft.com/kb/950717
…and if your PC is an HP Pavilion, Presario or Media Center and has an AMD processor you need to install this patch before installing SP3…
http://h10025.www1.hp.com/ewfrf/wc/softwareDownloadIndex?cc=uk&lc=en&dlc=en&softwareitem=pv-60484-2
…to find out if you have an AMD processor...
• Hold down the Windows key (between Ctrl and Alt) and hit the Pause Break key
• Your processor type is shown in the Computer: section
Then install SP3 by downloading and running from...
http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=24
…you can ignore the text that says that it is for network installations and also ignore the text advising Windows/Microsoft Update if only updating one PC.