Guys, If you're recording on a Windows PC that's live on the internet and have all the required protection running you're asking for trouble.

If you are going to record, disconnect from the internet and turn off all your virus and malware/adware protection. You really should also shut of your restore feature as well.
Dig out the tweaks that are suggested for speeding up your PC anyway and disable all the un-necessary junk. There's a lot of stuff going on in the background using up horsepower that you don't need.
Ideally you should set up as a multi-boot, one for music and another for general stuff. I don't remember if you can set different parameters for each user with Windows but I believe if you log on as administrator you can specify what's going on with individual users.