If you can boot into SafeMode with no problems you could try to do a System Restore......but if all the.dll files are missing ( which is weird, well i guess not when a Windows Update is in the equation ) you should try running chkdsk /r from the Recovery Console to see if that recovers some of the functionality to your system. But seriously, if all the dll files were missing from /system32, I wouldnt see how ud get as far as you're getting now.