Might suggest a free imaging back up program to shorten your fixes time and stay so you can use your time for other things when you visit: http://kb.macrium.com/KnowledgebaseArticle50185.aspx

See screen capture of above link for actual free software below:

You will need to copy/paste all newer files created after the last full image backup to a second internal drive or USB drive of some sort before you restore a known clean image, tho. Then you can update definitions, programs, etc., after restoring system.

Image restoration should take only 15 minutes or so with a standard HDD, much less than that with a SSD drive.