Thinkpad sluggish performance
I have a Thinkpad Tablet 1838CTO, kernel 18.104.22.168, running Android 4.0.3. Thanks to the information I found on XDA, I was able to repair the machine's power button, so it's still very much alive. I have used the tablet daily since I purchased it when it first came out. I have never refreshed the software or system. There is still some 5 GB free of internal storage and 20 GB on the SD card.
My issue currently is that the tablet has become very sluggish in performance. It takes a long time to initiate programs (like 10 seconds or so) and to switch between them. Scrolling of pages (whether web or book) goes as quickly as before, however. Is this a problem with a lack of a trim function for the SSD (as apparently implemented in Android 4.3) or something else altogether? I've read an earlier post where a Thinkpad was apparently bricked by trying "Lagfix" to trim the SSD. What's my best option for rejuvenating the Thinkpad?