Do you run into blue screens regularly and you read our tutorial how to fix blue screens but it didn’t help? Here is a tip how you can maintain the integrity of your system and check for files that are not digitally signed. Some drivers that are not signed may cause trouble, so this might be helpful if you have a few hours.
Windows 7 includes a tool called File Signature Verification. What it does? It scans your system drivers for digitally signatures. Not all drivers are obviously digitally signed. And that’s the kicker! Normally, you don’t have to worry about files that are not signed. In fact, a lot of new NVIDIA drivers may not be signed. However, if you are debugging your system it may be useful to know what drivers are not signed.
1. Step Click on Start.
2. Step Enter sigverif.exe and hit enter
3. Step The File Signature Verifications starts, click on Start to scan for system files that are not digitally signed.
4. Step Normally, you should get a message: “Your files have been scanned and verified as digitally signed:
Over at http://www.techsupportforum.com/ I found a list of files of a user that run the test. A lot of false positives popped up:
dxmasf.dll 8/22/2006 126.96.36.1993
mfc40u.dll 11/1/2006 188.8.131.5241
mxdwdrv.dll 3/22/2007 0.3.6000.0
mxdwdui.dll 3/22/2007 0.3.6000.16438
mxdwdui.gpd 8/31/2006 None
mxdwdui.ini 4/21/2006 None
nv4_disp.dll 4/19/2007 184.108.40.20624
nv4_mini.sys 4/19/2007 220.127.116.1124
nvapi.dll 4/19/2007 18.104.22.16824
nvcpl.hlp 4/19/2007 None
nvcod.dll 4/19/2007 22.214.171.124
nvcodins.dll 4/19/2007 126.96.36.199
nvcpl.dll 4/19/2007 188.8.131.5224
nvdisps.dll 4/19/2007 184.108.40.20624
nvgames.dll 4/19/2007 220.127.116.1124
nvhwvid.dll 4/19/2007 18.104.22.16824
nvmccs.dll 4/19/2007 22.214.171.12424
nvmccss.dll 4/19/2007 126.96.36.19924
nvmctray.dll 4/19/2007 188.8.131.5224
nvmobls.dll 4/19/2007 184.108.40.20624
nvnt4cpl.dll 4/19/2007 220.127.116.1190
nvoglnt.dll 4/19/2007 18.104.22.16824
nvsvc32.exe 4/19/2007 22.214.171.12424
nvvitvs.dll 4/19/2007 126.96.36.19924
nvwcplen.hlp 4/19/2007 None
nvwddi.dll 4/19/2007 188.8.131.5224
nvwss.dll 4/19/2007 184.108.40.20624
quartz.dll 8/29/2005 6.5.2600.2749
stddtype.gdl 4/21/2006 None
stdschem.gdl 8/4/2006 None
stdschmx.gdl 4/21/2006 None
strmdll.dll 8/21/2006 220.127.116.1136
unidrv.dll 3/22/2007 0.3.6000.16438
unidrvui.dll 3/22/2007 0.3.6000.16438
unires.dll 3/22/2007 0.3.6000.16438
Most of the dll files are from Nvidia (NV) and can be safely ignored most of the time.
However, you may want to try different drivers if you get blue screens frequently. Try a driver that IS signed.
You can check our page: Download latest video card drivers