Review by RanMan: I am using V2.0 which supports Vista and all the above listed. (Available at program's web site) It works just as good or better than the dozen or so I have tested and most importantly it appears to be very safe. Others I have tried either didn't do much or caused damage that had to be repaired. (5/5 - 8-Nov-2008) Review by DREW: MAKERS, THANK YOU FOR CONSDERING THE FOLKS WHO DOESNT EVEN HAVE A CREDIT CARD TO BEGIN WITH, AND WOULD LIKE TO CLEAN THEIR REGISTRY. ITS THE BOMB. (5/5 - 6-Nov-2008) Review by dude: Big Thanks!! to the creators of this awsome program sorted my beast out rell quick found and fixed more than the brought one and quick too (5/5 - 5-Nov-2008) Review by Ivan: Wow! I must admit I was skeptical at first, but after trying this product I highly recommend it. 1000+ errors on my PC were fixed, and now it is performing much better than it has in a long time! (5/5 - 4-Oct-2008) Review by ralphrainer: it thinks this 1's good since its all free... 10/10 for this nice freeware for us netusers who cant afford to pay for a program like this (5/5 - 25-Jul-2008)