I experimented once, I have krc2 on win95, I had to completely delete the system and decided to try to install winxp, I was able to install it without any questions, but I ran into a problem. winxp does not support the kuka program since it was developed for ms-dos for operating systems such as win95 and win98. Of course, you can try to install the program from under krc4 that works on win7, then maybe something will work out
If your KRC2 was supplied with WIN95 you cannot update to WinXPe.
IF you already have WinXPe there is nothint to update.