This program give me always corrupt message, after maybe 180,000 or sometimes bit more blocks download. Everything removed, or datadir on other drive, even win7 64 and win7 32, always same. I make 1 new windows install, same again. Only on other laptop with winxp it goes. Now I have other laptop for mining software for mini rig and avalon (have not yet any), must this laptop also have this bitcoin-qt program? Or better not?