I use FS9 with two PC Win7 Ultimate 64. On main PC i have two harddisk. FS9 is on drive D. System on C. And second PC connected via WideFS.Which installation for RC is advisable. C: D: or second PC for best and problemless performance ?

It shouldn't matter if it is C: or D:. Anything from a local harddrive is always faster than via a network (via the LAN). I personally have RC4 installed on my C:, but like I said...if you want to install it anywhere on the same PC where FS runs, that is always the fastest option. Next is a networked PC.

I use FS9 with two PC Win7 Ultimate 64. On main PC i have two harddisk. FS9 is on drive D. System on C. And second PC connected via WideFS.Which installation for RC is advisable. C: D: or second PC for best and problemless performance ?

if there fs9 and rc are running fine on the same pc, then bypass widefsthere might be a small performance gain, if rc was on a different disk than fs. but that also depends on disk architecture, storage controller design.if one drive is 7200rpm, and another one is 10000rpm, then i might choose the 10k rpm drive for bothif c and d are different volumes on the same physical drive, then it doesn't really matter.if c and d are the same drive type, on the same controller, put fs on c, and rc on d (to make possible permission/antivirus program issues).jd