Cannot stop Avira Antivirus service: access denied

You probably need to uninstall it, or disable it from the control panel / options that come with the A/V. Many viruses try to do the same thing you're doing (disabling the service) so that they can turn off the antivirus, so many A/V products mark their services as critical so that that can't happen.

Why does Windows need to restart every time it updates while Linux doesn't?

Installing Google Play Store in android emulator

Find the eigenvalues of linear transformation $T(x)= x - 2 \frac{x.v}{v.v} v$

Let $X$ be a topological space and $\mathcal{A}= \{f: X \to X \mid f \text{ continuous}\}$. Determine the topology that $\mathcal{A}$ induces on $X$.

Formula for compounding interest with yearly increasing additional payments

What is the derivative of $\sum_{i,j}^n \langle A^{ij}x_i,x_j \rangle$

Question about long exact sequences and homology

Why cannot a linear function of a dual space have a "constant term"?

Is it possible to get a 4 digit pin from this? [closed]

A question about extending group actions to maps.

What other theorems about the duality of projective geometry?

Proving $\{(x,y)\in{\mathbb{R}^2}:|x|^2+|y|<1\}$ is convex