REMEMBER THAT ONLY SUITABLE VERSION FOR WINDOWS 7 IS SEP 11.0.5 RU5
Sometimes SEP client is unable to install itself on Windows7 operating systems.
The problem is connected with 2 issues.
1. EXE file extractor[FreeExtractor] is not working correctly.
Sometimes on Windows 7 setup.exe file cannot automatically extract into %TEMP% folder.
To resolve this issue You need to Extract setup.exe file application like Winrar and install SEP using setup.exe or *.msi file in extracted folder.
2. Live Update application cannot be installed.
To resolve this problem You need to perform first step from point 1. but in hear firstly You need to install Live Update using LUSETUP.exe file after install it using setup.exe or *.msi file.
Second solution is to install SEP as unmanaged client.