I'm not a frequent user of CCleaner, but recently (I think) used an infected portable version from a USB stick when setting up some laptops for an overseas school. They are now in a remote location so it's not super simple to check the impact, but just wanted to ask an initial question here. I understand that the portable version was affected, but does that mean it installed anything locally, or would it just have gathered information while running and then stopped? i.e. did it subversively change any registry values while running, or is the malware effectively 'portable' like the version of CCleaner, so that once it's closed, nothing more happens? Hope that makes sense. Because they were basically new when cleaned and still generic, I'm not really that concerned about any personal data being gathered, because there really wasn't any, but need to find out if I should proceed with further cleaning to prevent future issues, or whether instead there is nothing residual on there because I used the portable version? 'Cleaning' now is complicated by location and language. If has to be done, so be it, but maybe isn't necessary because I used the portable version?