I am developing a standalone DeskTop product which is now almost finished. There is no database is used for product.
I want to deploy this product as a free eveluation copy for the first 30 days.
And I want to make product disable after that and keep on prompting for that purchasing it.
I do not want to store the date of Installation as a benchmark for 30 days. It is possible that user may change the system date and use the product.
One more thing, I also do not want the User to Uninstall and then Install again the Software and Use it after eveluation period.
I know this is bit tricky question, but i m sure u guys will definetely help me out !!!