@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
This program is a piece of shit. Didn't open basic files or basic operations. If it doesn't work for Windows 7, it should say so.
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?