@botenannie: Don't know what you are talking about... we are using 7-Zip on hundreds of Windows 7 PCs (x32+x64) without any problems. 7-Zip is fast, lightweight and free, so I'll give 4 Stars
Does not extract properly with Windows 8.1
As good as this program used to be, it also hasn't been updated in 3 years (9.22), even though 9.32alpha is around the corner. In addition still doesn't handle MSI extraction correctly. Are we ever going to see a working update?