If you are worried do what you should do anyway, backup. If you do not backup how can you ever think of downloading or doing anything on your computer. When you upgrade you will have a fallback for if you have any issues with errors. The program always works better updated anyway because more often than not you will find things have been changed for the better in the newer version. The issues that have happened on here are largely to do with browsers and library issues which are easily rectified. Older Operating systems do cause issues. But you seem to have a Windows 7 Laptop with no issues. Just make sure you system is up to date with Windows and vendor updates like Graphics and service library updates. Back up and update. With software like Acronis Backup you can even save the machine state and reboot in seconds to the previous software and settings if you are that worried. I hope this helps.
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