Installed and registered without problems on a Win 8.1.3 Pro 64 bit system. A clean install.

A German company from Bremen. We had had several software from this company, a previous 1-abc.net Hard Drive Washer 7 on December 13, 2013. Here are the old reviews:
http://www.giveawayoftheday.com/1-abc-net-hard-drive-washer-7/

So many awards, is there an award, which this company has not yet received? Missing Karl's reward for excellency?
http://1-abc.net/0012/

Nothing bad about washers, cleaners, removers, or whatsoever program to give you the feeling of having a fresh and clean computer. But the claim: "but most of the time they only decrease the speed of your system the more is installed on it." is absolutely misleading. A temp file my occupy space, cleaning a temp fill will reduce the temporary space for a short temporary time, but does not influence the "speed" of the system. Well always an exception - if your disk is at the limit with 99%...

I have stopped long time ago even using the well known Priform program for two reasons (it is even not on my system). First, due to the use of my "Freezer", all temporary files collected in the meantime, will be automatically removed and second, if I "thaw" the system for updates, I prefer the built in Microsoft cleaner. LOL

http://i.imgur.com/Fs7xQIT.png

You can even look beforehand, what data and files will be cleaned (German: show files)

The program does what it claims, the possibility for a "safe" clean to the trash bin is not very useful. How will you check 2000 files, whether they can be cleaned or not...

Have a well washed system and a nice weekend, too

Uninstalled via reboot, I wash myself.

An interesting program, but a few improvements are necessary (in my opinion). Like Karl said last time it was offered, it also found nearly 500 files that were unnecessary on what I thought was a clean system. After deleting them to the rubbish bin plus a backup folder like suggested it said to look for unnecessary files again, it found another 300+ so I deleted them again, then same again. Then I woke up what was happening. It was finding the files it had copied to the backup directory and deleting them again, and again. Either remove the backup directory from the search path, or preferably zip them up with a unique name after each clean. Also please provide a text file with the names and paths of what was deleted into the directory as well, to aid in knowing where to replace any that should not have been cleaned..
Otherwise a great little program as far as I can see so far.