Unfortunately, we've found Glary to be a SPAMMED item on these forums and that usually isn't a good thing.. In addition, if you search the forums, much like most other "optimizers', they frequently cause more harm than good. Incorrect file and registry removals can be devastating.
I find it interesting that most folks are drawn into the way many registry cleaners can find hundreds of errors and think that all those detections are relevant to making the computer faster.. Use a different registry cleaner and it may find more or less such errors depending on what criteria is used by that product. Which one is right? Most importantly, UNTIL YOU KNOW what registry entries are being removed and whether they are good or bad to remove, you SHOULD NOT be letting any program do it automatically. From Windows XP to Vista to Windows 7, we find that registry cleaners do almost nothing to help performance..
Primarily, optimizers don't really do much, if anything, to increase performance of the computer, despite all the hype they get.. Do they clean out registry items automatically, yes.. Can they clean up temporary and duplicate files, yes. (Not always a good thing by the way.) Can you use it to "defrag the registry", yes.. The important question?? Does any of this help make your computer any quicker? I've still yet to see an impartial benchmark type of review showing that any of these "optimizers" speed things up substantially..
And remember, most of the items in the program are already contained within Windows although they may be in a slightly different form.. Any defragmenter will defrag the registry files including the default version on Windows.. All of the latest versions of Windows already include a method to remove cookies, TIF files, etc.. and it also has a program "Startup Manager" in the System Configuration Utility" as well as other tools.
And some of the items are almost silly..
A "memory optimizer" just doesn't make sense.. Using a third party program which USES memory and resources to "save" memory.. Yea right...
Watch out for the "Tracks Eraser" as well.. It can eliminate "wanted" menu items and such..
So...Glary has a free trial.. If you're really into giving it a try, do so and find a reliable way to test performance by any changes you make.. Even better, before installing it and possibly causing damage to your computer, see if you can find a viable, reliable "benchmark" review of the product by a company that doesn't have a financial interest in the product and see what they say. Not the kind of review where users or a "so called expert" says: "I like it" but where impartial tests are performed to see if it actually does anything worthwhile.
Hope this helps.