Hi there niggles,
I tend to agree with Nihil on this one and you can find a free tool for malware and adware here:http://www.mwti.net/products/mwav/mwav.asp

It is free to download by just giving a few details etc..I have used it numerous times and believe me it has saved me a bundle..

It,s fairly simple to use and i hope it helps.

cheers
vanman