system
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Welcome to the forums, Tia Mia. 
You need do nothing soon once the files are in the chest as that is a protected area where they can do no harm to your computer. Just leave them there for several weeks. This is recommended in case one or more of those files is a needed file. Once deleted, you may not remember at a later date which file it is that you need to replace. If, at the end of several weeks, you have not experienced any adverse effects to your computer or it’s programs, then you can delete them from the chest and they will be gone. You could leave them there for months if you wanted to do so.
By the way, delete only the files in the Infected section. Never delete those in the System files section.