Rtkvac.sys Windows 7 32bit !full! Link

A driver designed for a 64-bit system contains different code binaries and interacts with the Windows kernel differently. Therefore, if you are running a 32-bit version of Windows 7, you use a 64-bit driver. Attempting to install the wrong architecture driver is a common cause of system instability. The Rtkvac.sys file for a 32-bit system is compiled specifically to run within that environment. Using the incorrect version will result in installation failures or the dreaded "Blue Screen of Death" (BSOD).