Problemn with Prl_strg.sys

I'm having a serious issue with prl_strg.sys when trying to start my VM machine. Windows isn't able to load and is always stuck at the following error message:

" File \Windows\System32\drivers\prl_strg.sys
0xc0000098
Windows failed to load because a critical system driver is missing or corrupt"

It seems that this prl_strg.sys is needed for booting. Is there a way that I can re-install it manually? Which driver contains the prl_strg.sys?

Please help - I urgently need my Parallels up and running again as I rely on it for my wedding preparations! Please urgently help!