1. Install Source Insight 4.0 2. Copy file "msimg32.dll" from archive to the folder with installed Source Insight ie: C:\Program Files (x86)\Source Insight 4.0 This is the patch itself, helps to skip RSA signature checking, same time prevent access to internet. 3. Use keygen "si4_kgen_unis.exe" to generate the license file. 4. Run Source Insight 5. If it ask a license, select "Import a new license file.", and select created on step 3 *.lic file. 6. Done! Enjoy!