No, it was absolutely clean install. If I remember correctly, I have even formatted this partition. I will try to do more tests and report an additional info.
[added]
Yes, it must be really somewhat with Windows.
I tried to
"c:\Program Files (x86)\WinRAR\WinRAR.exe" a c:\123.rar h:\test.txt
"c:\Program Files (x86)\WinAce\WinAce.exe" a c:\123.ace h:\test.txt
"c:\Program Files (x86)\7-Zip\7zG.exe" a c:\123.7z h:\test.txt
All three archivers are doing something but no c:\123.* file appears. No error warnings at all.
While doing the same for D: gives a normal "access denied error"
"c:\Program Files (x86)\WinRAR\WinRAR.exe" a d:\123.rar h:\test.txt
"c:\Program Files (x86)\WinAce\WinAce.exe" a d:\123.ace h:\test.txt
"c:\Program Files (x86)\7-Zip\7zG.exe" a d:\123.7z h:\test.txt
I really don`t understand. The permissions of C:\ are default.
4 Objects listed there:
Authenticated Users
System
Administrators
Users
Only Authenticated Users have strange permissions. Only special permissions are active for they : Create Folders/Append Data. All other are inactive. But if I create my own folder with exactly the same strange permissions, I can`t reproduce such a behaviour for archivers. They are normally reporting not enougth rights.
The thread should be moved to normal english forum then
).