Downloaded but won't run

No, Norah. Do not worry about it.

Please try to repair the AVG PC TuneUp as suggested here: http://support.avg.com/SupportArticleView?urlname=How-to-repair-AVG and check if it helps.
Yesterday I downloaded AVG Tune UP Unlimited.  It installed correctly.  It ran a tune up check correctly.  But today, it won't open.  I am Windows 10 and it says it is for Windows 8 has this got anything to do with it?  I bought it from Amazon.
No, Norah. Do not worry about it.

Please try to repair the AVG PC TuneUp as suggested here: http://support.avg.com/SupportArticleView?urlname=How-to-repair-AVG and check if it helps.

Yesterday, I reloaded the PC Tune UP software and it worked all day.  Today, it has stopped working again.  It says it is installed but it won't open.  I ran the Repair just now as you suggested, it said it had repaired it but it still won't open.

Norah, 

Sorry to hear that the issue persists, we have sent you an email requesting the diagnostic information to analyze the issue and provide you with a resolution. Please check your inbox and spam box as well and send the requested data to assist you further.