Sorry, I should have said- I have upgraded mine to 8GB Ram and a 2TB Samsung Evo SSD 850. I have Windows 10 but I have hacked it to have Windows MCE- it's the sole reason I got into HTPC. I have it hooked up a Silicon Dust quad network tuner supplying freeview tv to this but also my laptops and phones.
BUT it is a little temperemntal. The Intel graphics card seems to have "disappeared"- causing it to blue screen every so often- but especailly difficult getting it to update to latest windows "patch". I had to change the Blu-ray disc inside it 5 years ago when the old one broke. It is slow at loading the photos side of MCE- but I still love the professinal look of MCE's pan and zoom of photos matched with music- I have never moved onto Kodi etc. Also, it does not like staying asleep!
I got it when I had a tiny living room and replaced a larger Sony VGX XL100- which I liked and had room for tv tuners inside. Since then my ASRock has fitted in my hand luggage and been taken 1/2 way round the world for job/life in the USA- all with entire collection of my family's photos, music and films- and yet not a DVD, CD or photo album in sight. I now have room for a "proper" PC in the living room- but due to streaming services- Spotify/Netflix I just don't use the HTPC so much- plus the smartTV has Youtube etc built in. I will probably see if I can get 3-5 more years out of it...