I got that yesterday as a friend came with his machine. Changed the Memory, he used Kingston Hyper X, to Geil and things were working well!
Got this on my desktop, which isn't setup at all yet (no graphics drivers, hasn't been connected to the internet, and was idle for a day or two). Haven't seen it on my laptop yet (updated, drivers, set-up).
Desktop x86 and x64 Activated - none activated, VM only. 2GB, 4GB. 8GB ram, Modified, none modified - no matter what,
Yeah, that's just Windows Explorer bugging out, I think. Happens pretty consistently to me on my main Windows 10 test laptop. Well normally yes but I feel like in this instance it could probably be justified since stability shouldn't be an implicit expectation. Even OS X, for all its platform singularity, has had buggy features in the Yosemite DPs I tried (particularly with wifi, something that isn't even stable in the Yosemite GM Candidate 1.0 build, at least for this MacBook).