You need to renew Tally only if you are using rental license or renew TSS to access set of value-added features.1 Tally is a lifetime license, and you can continue using it as always with complete features and capabilities. Support for Windows 7 has been discontinued, Microsoft customer service no longer is able to provide technical assistance, and your PC no longer receives security updates. Windows 7 can run with less memory available, but in this day & age, there is no reason to have anything less than two gigabytes of ram.1 Is Windows 7 compatible with systems that have only 512MB of RAM? Yes, it will work, however i would only use it for word processing, web browsing and the like. If you want to run Windows 7 on your PC, here's what it takes: 1 gigahertz (GHz) or faster 32-bit (x86) or 64-bit (圆4) processor* 1 gigabyte (GB) RAM (32-bit) or 2 GB RAM (64-bit) 16 GB available hard disk space (32-bit) or 20 GB (64-bit) Can Windows 7 run with 512MB RAM? Developer 9 opens the Default TDL of Tally.exe(64-bit).