To make Microstudio run properly on Windows XP, Click here and follow the instructions to get running. 
The fix requires first installing the FULL version (not the demo) of Microstudio 2.312. Anyone who reports they have a problem to MTUSUPPORT will be sent a free download link to get 2.312 from our web site.
Any details you can provide us are appreciated and will help us solve this faster. The problem appears to be related to two conditions:
1. The computer was upgraded from Win 98 or ME to 2000 or XP. This installs the 2000 or XP operating system in the
WINDOWS directory instead of the
WINNT directory. Then, because we followed Microsofts' recommendations, our installation program doesn't find the REGISTRY!
2. Your hard drive may be formatted with NTFS instead of FAT32 file system.
If either of these apply to your computer, please let SUPPORT know that through this Forum.