Go to C:\Windows\Performance\WinSAT or %windir%\Performance\WinSAT and check the winsat.log.
If you find the following line:
893651 (2900) - winsat\main.cpp:4736: ERROR: Unable to save validated results.
then go to the DataStore folder and delete all files or create a new folder (e.g. TEMP) and move all files into it.
Now repeat the WEI computation and it should work.
This solved the problem for me.
At Bookboon.com you can legally download many free books for students and travel guides in PDF format. All the books can be downloaded without registration. To finance the project ads are embedded into the PDFs every other page.
Bookboon Wikipedia entry:
Bookboon.com is a website that provides users with free ebooks in various subjects. Currently two main areas are covered guide books and textbooks for bachelor's, master's and graduate students. It is owned and operated by Danish publishing house Ventus Publishing Aps.
The textbooks are written by university professors and lecturers, targeted at engineering, IT, economy and business students. On every third page there is a half page advertisement. The ebooks are meant as a supplement of the regular course curriculum, and are as such not directly applicable by the education institution. The books are exclusively written for bookboon.com and are therefore only available on the website.
The annual download rate of the books is claimed to be in excess of two million.
Windows XP only:
Alternative way:
If you want you can export the key in case you delete the wrong key or want the Shortcut back sometime later. (via, via)
All new R2.26!
• WinXP Driver Version: 5.10.0.5864
• Windows Vista Version: 6.0.1.5864
R2.26 | Vista, Windows7 (32/64 bits) Driver only (Executable file) | 34,16 MB | MD5: 2aa3d30ea44878b04ba42ca6f83bca79
http://rapidshare.com/files/242228899/Vista_Win7_R226.exe
R2.26 | Vista, Windows7 (32/64 bits) Driver only (ZIP file) | 34,25 MB | MD5: acd402685c791b0abd9c13f1d15066dd
http://rapidshare.com/files/242228974/Vista_Win7_R226.zip
R2.26 | Windows 2000, Windows XP/2003(32/64 bits) Driver only (ZIP file) | 28,7 MB | MD5: e1f5f9fe79f5dabab9384f7957a00d67
http://rapidshare.com/files/242228744/WDM_R226.zip
R2.26 | Windows 2000, Windows XP/2003(32/64 bits) Driver only (Executable file) | 28,6 MB | MD5: 27d2e99d452ec6ecc81c103ba2c2356a
http://rapidshare.com/files/242228972/WDM_R226.exe
README R2.26
http://rapidshare.com/files/242228678/R226_Readme.pdf
Linux driver (2.6) | 5.11 | 4,91 MB | MD5: 8df5b8b1dbc5398b6dbec37d454cc803
http://rapidshare.com/files/207783648/LinuxPkg_5.11.tar.bz2
R2.25 | ATI HDMI Audio Device | 16,3 MB | MD5: 38b5069830da73c5f1060900cd9f04c0
http://rapidshare.com/files/238548413/HDMI_R225.exe
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History:
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Driver Package R2.26
Realtek HD Audio Driver support all of Realtek HD Audio Codec .
1. Vista/Windows 7 WHQL Supporting: ALC882, ALC883, ALC885, ALC888, ALC889, ALC861VD, ALC660, ALC662, ALC663, ALC665, ALC260, ALC262,ALC267, ALC268, ALC269, ALC272, ALC273, ALC887
2. Windows 2000/XP WHQL Supporting: ALC880, ALC882, ALC883, ALC885, ALC888, ALC889, ALC861VC, ALC861VD, ALC660, ALC662, ALC663, ALC665, ALC260, ALC262, ALC267,ALC268, ALC269, ALC272, ALC273, ALC887
3. HDMI Device WHQL Support: ATI HDMI Devices
4. OS Supporting: Microsoft WindowsXP, Widnows2000, Windows Server 2003, Vista, Windows Server 2008,
Windows7 - x86/x64
5. Pack with Microsoft High Definition Audio UAAV1.0a(5013)
6. Add/Fix
1.) Driver :
1. Customizations.
2. Update SRS components.
When I tried to ping, ipconfig or similar, the prompt just said something like ""ipconfig" is not recognized as an internal or external command, operable system program or batch file.".
I checked the path variable under the "Environment Variables" ([WIN] + [Pause] ≫ Advanced ≫ Environment Variables): %SystemRoot%\system32;%SystemRoot%;%SystemRoot%\system32\WBEM
Okay, this looks good. So tried "echo %systemroot%" in the Command Prompt ([WIN] + [R] ≫ cmd) and the variable got correctly resolved: "C:\WINDOWS".
But when I tried "path" in the Command Prompt I got "PATH=%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\system32\WBEM;…". Correctly it should be "PATH=C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\system32\WBEM;…". 
Not knowing what the problem was I played around a bit with the "path variable" and suddenly it worked again. But not for long, next time I restarted the same problem reappeared. So decided to do a little research through Google and found this helpful blog post.
The problem is that the path key in the registry should be of the type "Reg_Expand_SZ" and mysteriously it was of type "Reg_SZ".
Here the step-by-step solution:
Another step-by-step solution without using the registry and which should do the same:
