All computers get slow over time, the more powerful ones do so in less time.
With Apple the machines slow down faster because there are more OS X upgrades than there is on Windows.
On Windows there is more updates, and of course anti-virus, which a lot of Mac users now also have to run it too.
Both on most Mac's and Windows machines, they are purposely underpowered as to appeal to people based on lower price, but disguise it's useful lifespan and force one into a faster hardware upgrade cycle.
So your paying more over time if you don't know what your looking at in hardware and chosing the right operating system.
After all both Apple, PC vendors and Microsoft benefit from a increased hardware turnover rate.
The web is growing more feature rich, programs get more bloated (especially Chrome), as developers try to make their software more appealing so you buy another copy.
3D games especially need very powerful hardware and the ability to upgrade the video card, which can no longer be done on nearly all Mac's, except the old silver case MacPro's which are soon to be obsolete by the new one coming.
With nearly all Mac's now, what you buy is what your stuck with. So boning up on the RAM and a SSD right away is important as you can't upgrade performance later. 😟
I currently have a Acer laptop that is: AMD A4-3300M APU wih Radeon (tm) hd graphics 1.90Ghtz and 4.00GB of ram - 3.74GB available.
My problem is that every 2 months i have to do a full factory reset and restore on my 2 year old Acer Aspire 15.7".
First off you have a 1.9 Ghz processor with integrated graphics, it's basically a bare bones computer good for surfing, emailing and lite office like work.
Your processor performance rank is a measly 1013, where #1 would be best.
http://www.cpubenchmark.net/cpu_list.php
You likely bought it cheap as it's all you can afford, problem is a processor that low powered isn't going to last very long, however if your prone ot dropping or losing it, then it's a idea "more disposable" machine due to it's low price.
Even though I have a powerful expensive Mac costing over $3000, I have a few "cheapies" running Linux for portable needs as well.
Your problem is you don't know your computers hardware or how to go about finding out, so your not able to make informed decisions on your performance for dollars purchases.
Windows PC's come in all types and price points, but their components are individually priced and evaluated so you can make a more informed decison if you knew how.
If your looking at getting a Mac, the only value ones are the most powerful models in each class, the lower grade models tend to do exactly like your machine is doing, being underpowered and goes obsolete sooner.
Difference is, despite the Mac and PC having the same hardware, your going to be paying a LOT more for the Mac turnover than on the PC, just because of the name and a few more attributes that don't amount to much.
On a Mac, your also paying for innovation by Apple, which gives it's own headaches but a first shot at newer advances that will eventually come to PC's later on.
So it makes sense if your in the market for a powerful computer, to buy a powerful Mac and make it last 5-7 years or even longer. Provided you can do that, and not have it stolen.
If your rough on hardware and can't afford the 3 years of AppleCare, the annual OS X and third party upgrades, still have to run Windows to keep your skills up there (as it's 93% market share) and also purchase it's software, then it's not a good idea for you now.
i want to know if I continue to use this 15-inch: 2.0GHz with Retina display Macbook Pro will it go slow in less than 5 years?
It most certainly will go slower in under 5 years, because Apple will upgrade OS X and third party software will bloat their features etc., to run well on the newer processors coming.
It's unreasonaable to expect any laptop made today to last longer than 5 years, the lower powered Mac's will last less now due to Apple decreasing the graphics performance on MacBook Pro's in favor of dropping the dedicated graphics. They are trying to exend the battery life and that means low graphics performance.
Should I upgrade it to 2.3GHz Quad-core Intel Core i7, Turbo Boost up to 3.5GHz.
The top of the line 15" MacBook Pro has the additional Nvida graphics processor which will greatly prolong the Mac's lifespan as it's offloading some of the graphics and generally be a cooler machine because the two sources of heat generation is seperated and there are two fans.
If your in the market for a long term portable Mac that lasts a long time, this is the only model I advise buying.
Problem is of course is dust, somehow you have to ask or get Apple to annually clean the dust out of the machine or it will overheat and die sooner, depending how dusty your environments are.
Also don't upgrade OS X unless your under the 3 year AppleCare coverage due to the possibly of the firmware/driver breaking the hardware due to unseen defects.
Since a Mac is all on the logicboard, any repair means replacing the entire computer guts.
If your looking for a lot more longevity, being able to upgrade the video card, cleaning out the dust and replacing keyboard, mouse, monitor., etc. I advise a PC tower instead with Windows 7 preferably.
Mac's are not cheap, and the lowe rprices ones do not offer better value because of their higher price.
OS X changes every year, Windows versions last 10 years at a time.
99% of all businesses, governments and corporations use Windows machines, so even if you have a Mac, your going to have to install Windows on it to keep your skills up for employment purposes.
I want you to get a Mac, but it has to be for the right reasons and your wondering if the higher price of Mac's means it will last longer.
I would say so for the high end models, provided you take extremely gentle care of it, not even using the built in keyboard and trackpad, using disposable wired or wireless ones instead.
Hope this assists. 🙂