Advanced SystemCare Free
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Full user review
"Good product but endangers your Solid State Drive"
Does a good job cleaning your system of unnecessary files and folders and of erroneous registry entries and optimizing it for good performance.
Tells you to defragment your system disk C: which, if it is a Solid State Drive rather than a Hard disk Drive, is not only unnecessary but may also damage your SSD.
Wait till the above defect is fixed. IObit promises to fix it in Version 4.