Steps to follow:
1. Open Run command type regedit
2. Right click on HKEY_CLASSES_ROOT click on Find
3. Search with jscript9.dll
4. Right-click on Default click on Modify
5. Rename jscript9.dll to jscript.dll in value data
6. Click on Ok
Repeat the same process if your PC belongs to 64 Bit Architecture.
After following the above steps try installing the K7 product.
Note: If the issue persists or you need any assistance, you may raise ticket at Submit a Ticket and Our Support Team will get in touch with you shortly to assist you.