While I don't know 100% for sure about Ubuntu 16.04, do know that all the Mint 18 beta testers had to do to get the stable release was apply all Level 1 updates, and were ready to roll.
Have been so busy assisting others that haven't had the time to do my own yet, though will perform clean installs after transferring the main folders in whole to an external, and after enabling the Firewall, delete any folders that duplicates the ones I transferred to the external & copy back over then update. Last year when purchasing a new Data drive, learned a lesson from carrying too many leftovers from release upon release, from Mint 12 (possibly 11) to 17.1. Can one imagine what a rat's nest of a /home configuration I had. While it was nice to be greeted to my default wallpaper, the OS was slowing, and after performing what I stated above, adding a larger Data drive (half of which is used for Mint /home), the total clean install was what the doctor ordered.
The only things I 'lost' were the configuration files of several Linux Mint releases, consuming several GiB's of data after deletion of the folders from the drive.
I'd imagine that Ubuntu 16.04 Preview testers has a similar upgrade path (no need to reformat & reinstall OS).
In the upcoming month, there will be an option to upgrade 17.3 (or lower point release) to Mint 18, would prefer to clean install. Upgrades from one OS to another (regardless of brand) still leaves a lot to be desired, and actually consumes a lot more data (over 2x as much) as a straight out clean install. And we have no way of knowing for certain if some preferences carries over, such as custom scripts for performance. One example is if the lowering of the default Swappiness of 60 to 10 (or 1 if running a SSD) holds. I'll never know because won't be upgrading in this manner.
Thanks guys , my portable DVD burner is fine cuz it works on my other laptop fine. so i did the sudo apt-get update, then i done the sudo apt-get upgrade and when it did the upgrade it seriously messed up my Operating system. i mean my desktop changed to like i was in safe mode in windows. everything was large, icons ect. i could'nt change it back to how it was before the upgrade.
If this was your first such upgrade, did you notice one or more stops that required input from you? The default in No or 'N' & what one should stick with unless an advanced user & knows what not going with default values may cause. Just type N & Enter at these stops, never Yes or 'Y' (unless it says it's the default, read these carefully). This may not be the reason why your system is acting up, yet thought I'd throw that information out there for the next time you install, or run into an option where there's a choice. If the Terminal says the default is No, then it's best to type 'N' & press Enter.
Am hoping that you soon have this issue fixed, and that it's not one of lack of power. Some USB ports, as I found out last night (less than 6 hours ago) cannot boot or even burn a CD, because there's not enough power, even when plugged in, to give what it needs. Though the computer does show that this device will perform faster in a 'high speed USB 2.0 port'. Heck, I thought that USB 2.0 was a standard, not some that are glorified USB 1.1 ports & others 'hi-speed' enough to be considered USB 2.0, though in reality, many USB 3.0 accessories are no better. While I've seen this warning on many computers, including another of my own, either the USB standard is what it says in the specs, or there's a serious case of false advertising between computer OEM's, that legally could spark a class action lawsuit. It's like wireless cards of the 'N' standard, these should run in this mode, unless connected to an older standard 'G' router, then the card becomes limited to what the router can provide. Certainly not 100Mbps, more like 54Mbps tops. In my case, unless there's a defect in the chain, the portable DVD burner should had been recognized & burned the 200MB CD ISO image.
In mine, the portable DVD burner that came from a notebook, and the SATA cable that attaches to it are USB 2.0 compatible, there's even USB 3.0 cables for these, so either should work & same for you. Unless there's not enough power to push it, then the power distribution was poorly engineered by the OEM of the computer. USB 2.0 & 3.0 has power requirements, while a powered USB strip may settle any 'low power' issue, this is not a permanent fix (rather roadside assistance) & should be used only when needed, not to view an entire movie. It could also be that the power supply is getting old (if more than 6-8 years old) & not providing it's labeled power stated on the brick. If a 3rd party PSU, well that can cause all sorts of issues, including being a fire hazard, especially if $10-12 new shipped & very light. Good PSU's are kind of heavy, has a solid feel to these, cheap ones are light & feels hollow inside. These also tends to get hot fast.
May need a new one myself, if so will look for a 90W replacement for the 65W IBM part, there's still new originals, sealed in package. Even to this date there are new sealed genuine IBM batteries for the T42 line from authorized resellers (often 3rd parties performing warranty repairs on the OEM's behalf purging old stock). May not last as long as when manufactured in 2003-04, yet will still be better than many 3rd party suppliers of 'no name' batteries. At least I feel that's the issue, that's how I reloaded the factory OS (7 CD's) by a portable drive as described above. Fortunately, can probably find a 90W PSU fairly cheap for that model, and hope it's not the DC jack working loose.
If so, don't know if I'll bother with that issue or not, could upgrade it to a T43 for the price & have some of the needed components on hand. Still, I just can't justify spending $100 for a fix of a 12-13 year old notebook while saving for a new PC build, will run 'as is' until no good, then destruct in the country with a rifle with some friends. I leave nothing in the trash that someone can dig out & fix.