For each tool below: what it does, what you get from it, and what you can actually do with it.
Finds the files that take up space for no good reason: caches, update leftovers, old crash reports. For every item you see what it is, where it came from and what changes if you delete it. Nothing is removed on its own.
One number from 0 to 100 on the dashboard, built only from what was measured on this PC: system drive, files to clean, driver updates, devices without a driver, startup programs and ransomware protection. Every point it loses is a link to the fix.
What is inside this PC, how its drives are and which games are installed where — read on this PC, nothing guessed. With Pro it also names the part most likely to hold the PC back for your kind of work, and which memory or storage upgrade Windows can prove would fit.
Checks your drivers through Microsoft's catalogue — those have been through certification and it is the safest source. Sometimes the manufacturer releases a newer version first; then Rain Cleaner tells you and points you at their page. No “driver packs” from places nobody has heard of.
Frees memory and lowers the priority of background programs while you play. The changes are temporary: stop the booster and everything goes back as it was. It does not promise a certain number of frames — that depends on the machine.
A familiar situation: you reinstall Windows and the network driver is missing — and you cannot download it, because there is no internet. Rain Cleaner carries basic Wi-Fi and network drivers and can install them offline, from a USB stick if needed.
A few decoy files are placed in your folders. You never touch them, but a program encrypting the folder runs into them early, because it works through the files in order. If it starts changing them, Rain Cleaner sees it: it takes a disk snapshot and stops the program that is writing. This is not an antivirus and does not replace one.
Processor, memory, disks and free space — each reading with its source, and “no data” where the machine gives none.
Set it once and it runs the check on a schedule, with the same explanations.
Installs the C++ Redistributables and DirectX that games expect to find.
Shows what starts with Windows and how much it delays the boot.
Checks whether the disk unlocks without a PIN and whether the recovery key is still there.
A suspicious file is moved aside, encrypted, and can be restored untouched.
Free, no account, no subscription. Windows 10 and 11.