What is the latest build number? I hear of 7200-7600 what are the differences? why is the down load only build 7100?

The latest build available to the public is 7100. See this thread for further info Windows 7 Unoffical buildsWindows 7 x64 RC, Asrock K8NF6P, AMD64 3200+, 1.5GB RAM, Palit Geforce 8400GS 256MB, 500GB Maxtor SataII, Asus 1814BLT optical

Fred - Mainly because most of those builds aren't necessarily stable. Those builds may be designed to test various fixes and may actually make things worse. If one thing gets fixed, something else may be broken in the process. Those buildswereNOT officially released to the general public. Instead, someone leaked them. But it gets worse - since these ISOs were released into the "wild", some individuals have taken to infecting them with trojans, spyware and other garbage - so when you install them, you wind up with a machine that's a member of some wanker's zombie army. The official reference on all of this can be found here.

Fred - Mainly because most of those builds aren't necessarily stable. Those builds may be designed to test various fixes and may actually make things worse. If one thing gets fixed, something else may be broken in the process. Those buildswereNOT officially released to the general public. Instead, someone leaked them. But it gets worse - since these ISOs were released into the "wild", some individuals have taken to infecting them with trojans, spyware and other garbage - so when you install them, you wind up with a machine that's a member of some wanker's zombie army. The official reference on all of this can be found here. I likewise would like to editorialize about the hazardsof beinginducted into a wanker's zombie army. So paranoidly concerned am I, that I logged a group of unexpected web accesses and blocked them with my firewall. I think they're tracking me with evil intent. Here's a partial list: m.webtrends.com ad.doubleclick.net microsoftsto.112.207.net131.107.115.28 analytics.atdmt.com www.google-analytics.com analytics.live.com googleads.g.doubleclick.net ad-g.doubleclick.net rad.msn.com. There are more. I plan to block them too, the wankers.

I likewise would like to editorialize about the hazardsof beinginducted into a wanker's zombie army. So paranoidly concerned am I, that I logged a group of unexpected web accesses and blocked them with my firewall. I think they're tracking me with evil intent. Here's a partial list: m.webtrends.com ad.doubleclick.net microsoftsto.112.207.net131.107.115.28 analytics.atdmt.com www.google-analytics.com analytics.live.com googleads.g.doubleclick.net ad-g.doubleclick.net rad.msn.com. There are more. I plan to block them too, the wankers. egads - Er... ok... That wouldn't be the type of traffic I was referring to... Ad serving web sites are not the same as a piece of installed malware that serves up spam - you know, viagra ads, ... or launches DDoS attacks...

I guess maybe you're right. But I still don't trust them. They'redeviouswankers.